module-for-acceptance using old project directory

Might need a little context here... I copied files from an older Ember project into a fresh directory to continue working on it. Mistake. I have most everything cleaned up after playing with nvm, bower, yarn, etc. There is one remaining flaw. When I run ember test --server, I have a lingering message that refuses to go away. I've updated my environment.js file with the name of the new project, I've scoured project.json, bower.json, etc. I ran yarn. Still the error persists. I've cleared both npm and bower caches, and installed fresh, deleted my node_modules and bower_components folders... I am getting annoyed at this point.

And here is the full mess I've been getting (more or less):

Died on test #1     at TestLoader.moduleLoadFailure (http://localhost:7357/assets/test-support.js:6468:11)
    at TestLoader.require (http://localhost:7357/assets/test-loader.js:69:14)
    at TestLoader.loadModules (http://localhost:7357/assets/test-loader.js:58:18)
    at Function.TestLoader.load (http://localhost:7357/assets/test-loader.js:89:24)
    at http://localhost:7357/assets/test-support.js:6477:16: Could not find module `mtg-games-client/tests/helpers/module-for-acceptance` imported from `game-analyzer/tests/acceptance/game-test`@ 2 ms
Source:     
Error: Could not find module `new-project-directory/tests/helpers/module-for-acceptance` imported from `old-project-directory/tests/acceptance/game-test`
    at missingModule (http://localhost:7357/assets/vendor.js:237:11)
    at findModule (http://localhost:7357/assets/vendor.js:248:7)
    at Module.findDeps (http://localhost:7357/assets/vendor.js:182:24)
    at findModule (http://localhost:7357/assets/vendor.js:252:11)
    at requireModule (http://localhost:7357/assets/vendor.js:35:15)
    at TestLoader.require (http://localhost:7357/assets/test-loader.js:67:9)
    at TestLoader.loadModules (http://localhost:7357/assets/test-loader.js:58:18)
    at Function.TestLoader.load (http://localhost:7357/assets/test-loader.js:89:24)
    at http://localhost:7357/assets/test-support.js:6477:16